{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "eeb386aeb5b7c8d2dae6a3ba49255d8a97803182"
            },
            {
              "fixed": "4ba8a08f5f26ed59f356a6318bca3aa7cc0af3e2"
            },
            {
              "fixed": "f73db632524320d2b93bc8534be8ea875053502d"
            },
            {
              "fixed": "6d554f2571e6b4db242593ba561efd6a6d1f99a9"
            },
            {
              "fixed": "09548edc6114f1eb1035b30795e893204ef45b85"
            },
            {
              "fixed": "bf09b9d7cd7890bc3a3b7eb63d5ece15f88bfde7"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.0.0"
            },
            {
              "fixed": "6.6.157"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.51"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93238.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/vfio-ap: fix potential use of uninitialized apm_filtered bitmap\n\nThe DECLARE_BITMAP(apm_filtered, AP_DEVICES) macro allocates the bitmap\non the stack without zero-initializing it.\n\nIn vfio_ap_mdev_hot_plug_cfg(), the vfio_ap_mdev_filter_matrix() function\nis only called to initialize and populate apm_filtered if either\nfilter_adapters or filter_domains is true. If the hot plug configuration\nchange only adds control domains (meaning filter_cdoms is true, but\nfilter_adapters and filter_domains are both false),\nvfio_ap_mdev_filter_matrix() is bypassed.\n\nConsequently, apm_filtered is passed to reset_queues_for_apids() with\nuninitialized stack garbage. This can cause reset_queues_for_apids() to\ninterpret arbitrary stack garbage bits as valid APIDs to reset, potentially\nperforming unintended guest hardware queue resets.\n\nFix this by zero-initializing the apm_filtered bitmap at the beginning of\nvfio_ap_mdev_hot_plug_cfg() using bitmap_zero().",
  "id": "CVE-2026-93238",
  "modified": "2026-09-26T03:30:43.952861438Z",
  "published": "2026-09-24T15:34:11.543Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/09548edc6114f1eb1035b30795e893204ef45b85"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4ba8a08f5f26ed59f356a6318bca3aa7cc0af3e2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6d554f2571e6b4db242593ba561efd6a6d1f99a9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bf09b9d7cd7890bc3a3b7eb63d5ece15f88bfde7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f73db632524320d2b93bc8534be8ea875053502d"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93238.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93238"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "s390/vfio-ap: fix potential use of uninitialized apm_filtered bitmap"
}